VISUAL PERCEPTION AND COGNITION LAB @ KGWU

 川村学園女子大学　視覚心理学研究室

 VISUAL PERCEPTION AND COGNITION LAB @ KGWU 

 

 

Microgenesis of surface completion

Bruno G. Breitmeyer, Jane Jacob. (2012). Microgenesis of surface completion in visual objects: Evidence for filling-out.
Vision Research, 55, 11-18.

Abstract & Figures

Hierarchies and reverse hierarchies in the visual system

Hochstein, S., & Ahissar, M. (2002). View from the top: Hierarchies and reverse hierarchies in the visual system. Neuron, 36, 791-804.

pdf

:

Feature search “pop-out” is attributed to high areas, where large receptive fields underlie spread attention detecting categorical differences. Search for conjunctions or fine discriminations depends on reentry to low-level specific receptive fields using serial focused attention, consistent with recently reported primary visual cortex effects. 

SEM by R

以下のサイトのデータを使い、Rのsemパッケージで検証的因子分析をおこなった結果を、GraphVizを使って図示してみた。

RでSEM（共分散構造分析／構造方程式モデリング）3

 

 

 

> path.diagram(MODEL1.sem, "ex1", ignore.double=FALSE, edge.labels="values", digits=2, standardize=TRUE)
Running dot -Tpdf -o ex1.pdf ex1.dot

ファイル名ex1で出力→　ex1.dot →　ex1.pdf を自動生成

cf.

GraphViz Download

グループ別の基本統計量

irisデータを使って、目的とする変数の基本統計量をグループ別にもとめる。

by(目的変数，グループ化変数，summary)

> iris
Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1 5.1 3.5 1.4 0.2 setosa
2 4.9 3.0 1.4 0.2 setosa
3 4.7 3.2 1.3 0.2 setosa
4 4.6 3.1 1.5 0.2 setosa
5 5.0 3.6 1.4 0.2 setosa
6 5.4 3.9 1.7 0.4 setosa

:

148 6.5 3.0 5.2 2.0 virginica
149 6.2 3.4 5.4 2.3 virginica
150 5.9 3.0 5.1 1.8 virginica

 

> by ( iris[1], iris[5], summary )

Species: setosa
Sepal.Length
Min. :4.300
1st Qu.:4.800
Median :5.000
Mean :5.006
3rd Qu.:5.200
Max. :5.800
------------------------------------------------------------
Species: versicolor
Sepal.Length
Min. :4.900
1st Qu.:5.600
Median :5.900
Mean :5.936
3rd Qu.:6.300
Max. :7.000
------------------------------------------------------------
Species: virginica
Sepal.Length
Min. :4.900
1st Qu.:6.225
Median :6.500
Mean :6.588
3rd Qu.:6.900
Max. :7.900

 

SDならば，

> by ( iris[1], iris[5], sd)

Species: setosa
[1] 0.3524897
------------------------------------------------------------
Species: versicolor
[1] 0.5161711
------------------------------------------------------------
Species: virginica
[1] 0.6358796

 

一般に，複数の要因の水準の組み合わせ（たとえば：データxの２から４列目）ごとに求めるならば，グループ化変数をx[2:4]のように指定する。

 

cf. tapply()

 

 

The role of perception in science and mathematics

Goldstone, R. L., Landy, D., & Son, J. Y. (2008). A well grounded education: The role of perception in science and mathematics. In M. de Vega, A. Glenberg, & A. Graesser (Eds.) Symbols, embodiment, and meaning. Oxford Press (pp . 327-355).

pdf

 

 

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